[PATCH nft v9]tests: py: fix pyhton3

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This patch changes the file to run on both python2 and python3.

The tempfile module has been imported and used.
Although the previous replacement of cmp() by eric works, 
I have replaced cmp(a,b) by ((a>b)-(a<b)) which works correctly.

Thanks!


Signed-off-by: Shekhar Sharma <shekhar250198@xxxxxxxxx>
---
The version hystory of this patch is:
v1:conversion to py3 by changing the print statements.
v2:add the '__future__' package for compatibility with py2 and py3.
v3:solves the 'version' problem in argparse by adding a new argument.
v4:uses .format() method to make print statements clearer.
v5:updated the shebang and corrected the sequence of import statements.
v6:resent the same with small changes
v7:resent with small changes
v9: replaced os module with tempfile and replaced cmp(a,b)
    with ((a>b)-(a<b)).


 tests/py/nft-test.py | 55 +++++++++++++++++++++++---------------------
 1 file changed, 29 insertions(+), 26 deletions(-)

diff --git a/tests/py/nft-test.py b/tests/py/nft-test.py
index 09d00dba..7ebcc8f1 100755
--- a/tests/py/nft-test.py
+++ b/tests/py/nft-test.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/env python
 #
 # (C) 2014 by Ana Rey Botello <anarey@xxxxxxxxx>
 #
@@ -13,12 +13,15 @@
 # Thanks to the Outreach Program for Women (OPW) for sponsoring this test
 # infrastructure.
 
+from __future__ import print_function
 import sys
 import os
 import argparse
 import signal
 import json
 import traceback
+import tempfile
+
 
 TESTS_PATH = os.path.dirname(os.path.abspath(__file__))
 sys.path.insert(0, os.path.join(TESTS_PATH, '../../py/'))
@@ -490,7 +493,7 @@ def set_check_element(rule1, rule2):
     pos1 = rule1.find("{")
     pos2 = rule2.find("{")
 
-    if (cmp(rule1[:pos1], rule2[:pos2]) != 0):
+    if (((rule1[:pos1] > rule2[:pos2]) - (rule1[:pos1] < rule2[:pos2])) != 0):
         return ret;
 
     end1 = rule1.find("}")
@@ -501,13 +504,13 @@ def set_check_element(rule1, rule2):
         list2 = (rule2[pos2 + 1:end2].replace(" ", "")).split(",")
         list1.sort()
         list2.sort()
-        if cmp(list1, list2) == 0:
+        if ((list1 > list2) - (list1 < list2)  == 0):
             ret = 0
 
     if ret != 0:
         return ret
 
-    return cmp(rule1[end1:], rule2[end2:])
+    return ((rule1[end1:] > rule2[end2:]) - (rule1[end1:] < rule2[end2:]))
 
 
 def obj_add(o, test_result, filename, lineno):
@@ -770,7 +773,7 @@ def rule_add(rule, filename, lineno, force_all_family_option, filename_path):
             unit_tests += 1
             table_flush(table, filename, lineno)
 
-            payload_log = os.tmpfile()
+            payload_log = tempfile.TemporaryFile(mode="w+")
 
             # Add rule and check return code
             cmd = "add rule %s %s %s" % (table, chain, rule[0])
@@ -910,7 +913,7 @@ def rule_add(rule, filename, lineno, force_all_family_option, filename_path):
                               gotf.name, 1)
 
             table_flush(table, filename, lineno)
-            payload_log = os.tmpfile()
+            payload_log = tempfile.TemporaryFile(mode="w+")
 
             # Add rule in JSON format
             cmd = json.dumps({ "nftables": [{ "add": { "rule": {
@@ -1016,9 +1019,9 @@ def execute_cmd(cmd, filename, lineno, stdout_log=False, debug=False):
     :param debug: temporarily set these debug flags
     '''
     global log_file
-    print >> log_file, "command: %s" % cmd
+    print("command: {}".format(cmd), file=log_file)
     if debug_option:
-        print cmd
+        print(cmd)
 
     if debug:
         debug_old = nftables.get_debug()
@@ -1212,7 +1215,7 @@ def run_test_file(filename, force_all_family_option, specific_file):
         sys.stdout.flush()
 
         if signal_received == 1:
-            print "\nSignal received. Cleaning up and Exitting..."
+            print("\nSignal received. Cleaning up and Exitting...")
             cleanup_on_exit()
             sys.exit(0)
 
@@ -1319,13 +1322,13 @@ def run_test_file(filename, force_all_family_option, specific_file):
 
     if specific_file:
         if force_all_family_option:
-            print print_result_all(filename, tests, total_warning, total_error,
-                                   total_unit_run)
+            print(print_result_all(filename, tests, total_warning, total_error,
+                                   total_unit_run))
         else:
-            print print_result(filename, tests, total_warning, total_error)
+            print(print_result(filename, tests, total_warning, total_error))
     else:
         if tests == passed and tests > 0:
-            print filename + ": " + Colors.GREEN + "OK" + Colors.ENDC
+            print(filename + ": " + Colors.GREEN + "OK" + Colors.ENDC)
 
     f.close()
     del table_list[:]
@@ -1336,7 +1339,7 @@ def run_test_file(filename, force_all_family_option, specific_file):
 
 
 def main():
-    parser = argparse.ArgumentParser(description='Run nft tests', version='1.0')
+    parser = argparse.ArgumentParser(description='Run nft tests')
 
     parser.add_argument('filenames', nargs='*', metavar='path/to/file.t',
                         help='Run only these tests')
@@ -1359,6 +1362,10 @@ def main():
                         dest='enable_schema',
                         help='verify json input/output against schema')
 
+    parser.add_argument('-v', '--version', action='version',
+                        version='1.0',
+                        help='Print the version information')
+
     args = parser.parse_args()
     global debug_option, need_fix_option, enable_json_option, enable_json_schema
     debug_option = args.debug
@@ -1372,15 +1379,15 @@ def main():
     signal.signal(signal.SIGTERM, signal_handler)
 
     if os.getuid() != 0:
-        print "You need to be root to run this, sorry"
+        print("You need to be root to run this, sorry")
         return
 
     # Change working directory to repository root
     os.chdir(TESTS_PATH + "/../..")
 
     if not os.path.exists('src/.libs/libnftables.so'):
-        print "The nftables library does not exist. " \
-              "You need to build the project."
+        print("The nftables library does not exist. "
+              "You need to build the project.")
         return
 
     if args.enable_schema and not args.enable_json:
@@ -1434,19 +1441,15 @@ def main():
             run_total += file_unit_run
 
     if test_files == 0:
-        print "No test files to run"
+        print("No test files to run")
     else:
         if not specific_file:
             if force_all_family_option:
-                print "%d test files, %d files passed, %d unit tests, " \
-                      "%d total executed, %d error, %d warning" \
-                      % (test_files, files_ok, tests, run_total, errors,
-                         warnings)
+                print("%d test files, %d files passed, %d unit tests, " % (test_files, files_ok, tests))
+                print("%d total executed, %d error, %d warning" % (run_total, errors,warnings))
             else:
-                print "%d test files, %d files passed, %d unit tests, " \
-                      "%d error, %d warning" \
-                      % (test_files, files_ok, tests, errors, warnings)
-
+                print("%d test files, %d files passed, %d unit tests, " % (test_files, files_ok, tests))
+                print("%d error, %d warning" % (errors, warnings))
 
 if __name__ == '__main__':
     main()
-- 
2.17.1




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